Synonyms of hello

1 Syllable
pooh, hey, oop, ugh, hi, ah, um, er, ums, ers, huh, psst, phooey
2 Syllables
hooray, oh's, hi-ya, bonjour, egad, greeting, hailed, greetings, hailing, ahem, jeepers, shalom, howdy
3 Syllables
howdy-do, welcome
4 Syllables
how-do-you-do, interjections, interjection, salutation